Modernization of the Network of the Americas to Support Earthquake and Tsunami Early Warning

Date: 4/25/2019

Time: 02:00 PM

Room: Puget Sound

UNAVCO provides operations and maintenance support for a number of geodetic networks across the globe as part of the GAGE (Geodetic Facility for the Advancement of Geoscience) cooperative agreement between NSF and UNAVCO. One such network is the Network of the Americas (NOTA), a federated network from a subset of GNSS stations from the Plate Boundary Observatory (PBO), TLALOCNet in Mexico, and COCONet in the Caribbean. UNAVCO will enhance the ~1100-station NOTA with multi-constellation GNSS observations and robust, high-rate (1 Hz), real-time streaming at a growing number of existing stations, for network modernization and cost savings in data management. We will present a summary of the network modernization plan for NOTA.

High-rate GNSS data streams from NOTA, collected and distributed by UNAVCO, are currently being used in prototype earthquake and tsunami early warning systems. The 2018 Anchorage earthquake provided a unique opportunity to test our methods for estimating earthquake magnitudes using peak ground displacements derived from GNSS positions in regions where the seismic and geodetic networks are sparse. We will also present a summary of the real-time GNSS assets in Alaska along with earthquake detection thresholds for the current GNSS network in Alaska. This analysis is essential to identify critical gaps in existing GNSS networks for integration of GNSS into any operational tsunami early warning system.

Presenting Author: Glen Mattioli

Authors